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https://issues.apache.org/jira/browse/FLINK-15557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17014425#comment-17014425
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Chris commented on FLINK-15557:
-------------------------------

This is more of a work around. We have to relax our connection(entity level) to 
use a more generic connection(namespace level).  We should be able to connect 
at the entity level like we were prior to the issue surfacing. We are able to 
make an entity level connection using kafka-client 2.3.1 in a simple spring 
boot app

> Cannot connect to Azure Event Hub/Kafka since Jan 5th 2020. Kafka version 
> issue
> -------------------------------------------------------------------------------
>
>                 Key: FLINK-15557
>                 URL: https://issues.apache.org/jira/browse/FLINK-15557
>             Project: Flink
>          Issue Type: Bug
>          Components: Connectors / Kafka
>         Environment: Java 8, Flink 1.9.1, Azure Event Hub
>            Reporter: Chris
>            Priority: Blocker
>
> As of Jan 5th we can no longer consume messages from azure event hub using 
> Flink 1.9.1.  I was able to fix the issue on several of our spring boot 
> projects by upgrading to spring boot 2.2.2, kafka 2.3.1, and kafka-clients 
> 2.3.1
>  
> 2020-01-10 19:36:30,364 WARN org.apache.kafka.clients.NetworkClient - 
> [Consumer clientId=consumer-1, groupId=****] Bootstrap broker 
> *****.servicebus.windows.net:9093 (id: -1 rack: null) disconnected



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